Loom-shuttle.



J. NDRTHROP & E. S. WOOD.

LOQM SHUTTLE. 7 APPLICATION TILED 1720. "5190s.

Patented June 29, 1909.

Jaw/M73, $7M 07 297270 -zadaeuaoa .are provided withuza n'nular projections or iorccster; State means i'or engaging and holding the bobbin I deavoring to overcome breakage of the jaws 'ing the rooves nearer the base of the'jaw of AN lrlVEltlfiTl \YOOD, OF

.iLIAM F. lMtAPElt, OF HO JQNAS son minor To all whom it Wizaj concern:

Be it. knoi vn that; we, JoNAs Non'rnnor and llvnm'rrir woe oitimns ol' the United Estates, and I'OSKlOHtSOf lio cdale, county of ol' lylassac iusetts, have in vented an Impri rent in loom-Slnrttles, of whit-l thei'ollowi doscri 'ition, in connec firm-.nN-ith the,accompanying drawing, is a specification; likecharacters on the d rawiug rclpresontin g like p artss This invention relates to loom shuttles of the tvpe wherein-the bobbin is inserted automatiu i-y ,whilethe-loom working, and it has for its object the improvement of the l 1 r l in proper"positioniwlien placed in the shuttle. The heads of bobbins for use in such shuttles rings which fit-"into upright grooves or notches made in the opposite and inner faces of resilient or spring jaws held in the shuttle body at one end of the bobbin receiving opening thereof, the jaws slightly converging toward their free ends when there is no bobbin between them.

Vi hon the bobbin is inserted the rings ongage the upper portions of the jaws and de ileot or spring the latter apart to )ermit the bobbin head to pass down into t re central. portions of the grooves, the latter being curved longitudinally to firmly gras) and hold the rings when seated therein. nonat the time of bobbin. insertion we have found that the metal has been unduly weakened at or near the grooves nearest the shuttle'wood, the series of grooves in the j aw heretofore having been made of equal do 3th from one to the other end of the series. We ave overcome this breakage to a very great extent, by makless depth than the other grooves, and 1n fact the percentage of breakage is thereby reduced to an exceedingly small amount. Ne have also facilitated the entrance of the bobbin into position between the jaws by providing the upper ends of the grooves with guide-entrances Which are flared outwardly and also transversely, and located symmetrically with relation to the grooves, so that the bobbin rings in entering the jaws Wlll not ride or rest upon the ridges or partitlons between adjacent grooves.

Figure 1 is a top plan view partly broken out, of the bobbin holding end of a loom Herein we have SllOYi ll the aws as separate,

noPnoALn, nAssAci-iusic'r'rs, Assmnons T0 PEDALE, nAssAcuusaris- LOOMsHUTTLE.

Specifications! Letters Patent.

Patented June 29, 1909.

Application filed December 7, 1908. Serial No. 466,205.

shuttle with one embodiment of our invention applied thereto. Fig is an. inner face new of one of the jaws detached. Fig. 3 is a longitudinal section of the jaw on the line 3 3, Fig. 2.

.ln Fig. 1 the shuttle-body 1 has a bobbin receiving opening 2, the head 8 of the bobbin having usual annular projections or rings 4 thereon, and the jaws are'hcld in the shuttle in any suitable manner, i'orn'iing no part of our present invention, a transverse bolt 5, shown in dotted lines passing through the shuttle-wood and the shank portions of the jaws.

and in practice made of resilient plate-metal, each aw comprising a shank portion 6, a free end or bobbin-holding portion 7, and a reversely-bent connecting )art 8, the shank portion having a hole 9, lugs. 2 and 3 for the bolt 5. The shank portions are fixedly held in the sluittlc-wood, the free end 7 of the jaws extending into the bobbin-receiving opening 2 in one end thereof, as usual.

Inaccordancc with our invention the inner faces of the free ends of the jaws are provided with opposite, upright grooves 1O, 10*, Figs. 2 and 3, the grooves 10. being longer and deeper than the grooves 10 as best shown in Fig. 3, the latter grooves being nearer the rcversely-lmnt portion 8. When the free ends of the jaws are separated by an incoming bobbin the greatest strain comes upon those grooves near the bases of the free ends of the jaws, but by making such grooves, as 10*, of less depth. than the other grooves we increase the thickness of the metal at or near the point of greatest strain, and thereby increase the resistance to ru ture when" the jaws are flexed or spread. I the rings 4 on the incoming bobbin-head strike the-upper edges ofthe jaws directly over the holding grooves the rings will pass down into the gr0oves,but if the rings strike at one side of such grooves there is a tendency to improper positioning of the rings, so that the bobbin is not securely held. To overcome thiswe provide at the upper end ofeach groove a guide-entrance 11, communicating withflthe groove and flared both outwardly and transversely, in a substantially inverted coneshape, and symmetrically located with relation to the groove, that is, with the longitudinal axes, of the groove and guide-entrance alincd, so that'when the rings strike.

' the upper ends of the'grooves, which conlmunicate at 12, Fig. 2, with the small ends vof the guide entrancesi The symmetrical arrangement of the guide-entrances rela tively to the grooves j rovides a smooth entrance of the rmgs n o other side" of their axes. g l The entrances for the shallow grooves are in practice made of less depth than the entrances for the other grooves, to increase the thickness of the metal, for the same reain extreme cases, it is' inserted so son that the grooves 10 are made shallower than the other grooves. There are a sufiicient number of grooves to accommodate variations in the positionof the shuttle when a bobbin is in'sertechand to securely reep and hold the bobbin, while the shal ower grooves will cooperate with one or more of the deeper grooves to hold the bobbin when, I far back from the ti s of the jaws. Should-the shallower jaws e omitted altogether there would be n'othin to effect a firm grasp upon the rings shou' d the shuttle be materially out of place at the time of transfer, and warp breakage or other damage would. result by reason of the faulty positioning and holding of the bobbin,

'Having fully described our invention,

, j the grooves, even it they enter'the guide-entrances at one or the ward the ends of the jaws of the jaws increasing injdimension toward the base of the jaws.

3. Bobbin holding means for loom shut- 'tles, comprising resilient jaws having bobbin what We claim as new'a'nd desire to secure by Letters Patent is 1 1. A loom shuttle provided with a bobbin receiving opening having resilient bobbin holding jaws mounted at one end thereof, the thickness of the material of said jaws decreasing from a point adjacent the end wall of the bobbin opening toward the end of said aws.

2. A loom shuttle-provided with a bobbin receiving opening having resilient bobbin holding jaws mounted at one end thereof,

said jaws being provided with bobbinholding grooves, the grooves increasing in-depthtoand the material holding grooves, the grooves near the base of the jaws being of less dimension than those toward the end of the jaws and said grooves having ide entrancesflarin'g toward the end and aseof the jaws.

In testimony whereof, we "have signed our names to-this specification, in the presence of I two subscribing witnesses.

- N JONAS NORTHROP.

' EVERETT S. WOOD.v

Witnesses:

WENDELL WILLIAMs, RICHARD L. RoY'oE. 

